Hose Identification on 2tr-fe

I originally thought this was the PVC but after some research its not. The hose in question connects from the back of the intake to the valve cover. Its about a 3/4" hose. Does anyone know the function of this?

 

Its part of the PCV system. Its the hose that provides clean air into the valve cover / crankcase.

Check out the engine bay guide link in my sig.

 

^ yup

The PCV valve (on the back side of the valve cover) draws air out of the engine by intake vacuum. This hose you're asking about provides clean filtered air into the engine, so there is a flow of clean air through the engine. I just don't understand why they decided to put the PCV in- and out- locations so close together on the valve cover. Looks like around 8 inches separating them.

So how does the foul air in the bottom end (crankcase) get pulled out if all the ventilation happens at the top? That's what I want to know.

 

actually, they aren't that close. that big inlet on top leads to two smaller outlets on the underside of the valve cover. i forget if they were near the front or back tho.

edit... https://www.youtube.com/watch?v=Fzm_W5PUCbI you can see them right around the 6 minute mark. looks like they are between 1 and 2, 2 and 3 and back by 4

 

This is the best video on YouTube for replacing a valve cover gasket.

 

directionaly yes, but his use of a power wrench to tighten the bolts makes me cringe. pretty sure those are more than the 80in lb's required.

 

Maybe I missed something, I watched him use a power wrench to loosen the bolts and a closed end wrench to hand tighten them. What I didn't like was a technician not taking the time to look up the torque spec. when that information should be a few keystrokes away.

 

just past the 8 minute mark....

when you or I can pull torque info in minutes, there is no reason for a shop to not do that when you are paying 100+ an hour

 

I agree it is not like this information is difficult to find. He did use a power wrench when tightening bolts which is bad practice, even though he used a ratchet to torque them. There is a video on YouTube that shows someone changing their spark plugs on a Tacoma, the person never hand tighten the plugs and uses a power wrench to insert then torque them.

 

Hey guys, I’m new here!
I know this is an old thread, but I recently discovered the hose on my truck was not installed on this part of the PCV system. After some thinking I can only assume it was not reinstalled 14 month ago when I had a shop do my plugs.

My questions are, is this port under vacuum? And what would the negative affects of driving for 14 months with it uninstalled be?

 

It's not a huge problem but it could be a vacuum leak. Overall I wouldn't worry about it from a health standpoint for the engine. It helps keep buildup from occurring and releases excess pressure when the PCV valve cannot bypass enough. I'd just put it back to stock and go about my merry way

 

Thanks for the reply! I got a p0101 code 2 times in that period, but it cleared it self both times. The only reason I saw the hose unhooked yesterday was when I did a throttle body / MAF cleaning due to the code. Then I said well that’s probably the issue there.